Change-speed mechanism



Nov. 4 1924. n 1514.485

P. s. WARD i CHANGE SPEED MECHANISM Filed oct. zo, 1922 4 sheets-Sheet 1Nov. 4 1924.

P. S. WARD CHANGE SPEED MECHANI SM Filed oct. 20,Y 1922 4 Sheets-Sheet 2Nw. 4. 19M. b514455- V y P. s. WARD CHANGE SPEED MECHANI SM 15j 79 86459 u I u D 34 33 50 l 97 9g "95 a1 Patented Nov. 4, 1924.

oFFlcE.

PAUL S. WARD, OF CINCINNATI, OHIO, ASSIGNOR TO THE TRIUMPH MANUFACTURINGCOMPANY, OF CINCINNATI, OHIO, A CORPORATON OF OHIO.

CHANGE-SPEED MECHANISIVI.

Application filed October 20, 1922. Serial No. 595,759.

To all whom t may concern.'

Be it known that l, PAUL S. WARD, a citizen of the United States,residing at Cincinnati, in the county of Hamilton and State of (lhio,have invented certain new and useful Improvements in Speed-ChangingMech` anism, of which the following is i. specification.

lt is the object of my invention to provide speed changing mechanismcomprising novel actuating means for effecting speed changes so arrangedthat various changes 'in gear relations may be obtained withoutinterference in the gearing; further, to provide novel means whereby thegearing is normally locked in neutral relation; further, to providenovel means whereby the gearing is returned to neutral relation betweengear changes; further, to provide novel means for clutch actuation inconnection with the gear changes so that the clutch is actuated bythevactuating meansfor edecting speed changes; further, to provide novelmeans whereby, upon making a change of speed, speed change is firsteffected, followed' by clutch actuation by a continuous movement of theactuating means for effecting speed change; and, further, to providenovel means whereby, when changing from one` speed to another, theclutch is released, the gears are placed in neutral relation, the speedchange is made, and the clutch' again actuated, in the sequence named.

The invention will be further readily understood bythe followingdescription and claims, and from the drawings, in which latter:

Fig. 1 is a plan view of my improved device, with the cover of the gearcasing removed.

Fig. 2 is a side elevation of the same, with the gear casing partly insection.

Fig. 3 is an end view of my improved device.

Fig. 4L is a plan view of my improved device, with the cover of the gearcasing partly broken away, and; showing a speed change relation justprior to the moment of clutchl line 6&6, of vFig. 2, showing the partsin neutral relation.

Fig. 7 is a similar cross-section, showing the parts in relation forshifting one of the shifting rods.

Fig. 8 is a cross-section, taken on theline 8*-8, o-f Fig. 2, showingthe operative connection yof the operating means for clutch operation. f

Fig. 9 is a cross-,section of the' operating means, taken on theirregular line 9 9, of Fig. 6.

Fig. 10 is a cross-section of the same, taken on the line 10-10, ofFig'.f6.

Fig.- 11 is a front elevation 'of the same, with the frame partly insection in the plane of the line 11-11, of Fig. 8.

Fig. 12 is a rear elevation of the same, with the frame partly insection in the plane of the irregular line 12-12, of Fig. 8.

Fig. 13 isv an aXial section of the exemplified clutch mechanism, takenon the section line 13-13,'of Fig. 1. I

Fig. 14 isy av cross-section of the same, taken in the plane of the line14-14, of Fig. 13; and,

Fig. 15 is a crossesection of the same, taken in the plane of the line15-15, of Fig. 13.

I do not herein claim the clutch mechanism herein shown and described,having shown, described and claimed the same in a copending applicationfor patent on improvements in 4friction clutches, filed by me August 26,1922, Serial No. 584,409.

` The speed changing mechanism exemplified comprises a shaft 21 and ashaft 22, either of which 'may be the driving shaft and the other ofwhich may be' the driven shaft. The shaft 21 isrepresented as thedriving shaft and the shaft 22 as the driven shaft. The shaft 22 isshown provided with a bevel-pinion 23 fast thereon, meshing with abevel-gear 24 about an upright shaft 25, with which the bevel-gear mayhave splinelrey and groove connection 26 for maintainingdrive-connection with said shaft during` axial movements of the shaft.rThis shaft may for instance be the upright axially movable drive-shaftfor the Whip of a cake mixing machine, or may be employed for otherpurposes.

The shaft 21 is journaled in a bearing 31 of a suitable casing 32 and ahub 33, in turn journaled in a bearing 34 of said casing, a pulley 85being shown attached to said hub for driving said shaft through themedium of a clutch 36 hereinafter more fully described. The shaft 22 isjournaled in bearings 38, 89, of the casing. The lovver portion of thecasing may be an oil-reservoir 40 accessible through the removable cover41 secured to the body of the casing by screws 42. A viewing lens 48 inthe casing shows the level of lubricant in the reservoir A set of gears46, 47, land a set of gears48, 49, are fast on the shaft 22. A nest ofgears 51, 52, fixed together, has suitable spline-key and grooveconnection With the shaft 21, and al nest of gears 54, 55, xed together,has spline-key and groove connection- 56 with the shaft 21, thesplinekey and groove connection for the nest of gears 51, 52, beingsimilar to this lastnamed connection. The gears 51, 52, are of differentdiameters, and are arranged to be placed rby axial movementv in mesh orout of mesh with the respective gears 46, 47, also of differentdiameters, or to be placed out of mesh With both said last-named gearsfor neutral relation, shown between said lastnamed gears in Fig. 1. rlhegears 54, 55.y are of different diameters and are arranged to be placed,by axial movement, in mesh or outv of mesh with the respective gears 48,49. also of different diameters, or to be placed out of mesh With bothsaid lastnamed gears for neutral relation, shown between said last-namedgears in Fig. 1.

A. fork 60 is arranged to shift the nest of gears 54, 55, being shownreceived in an annular groove 61 in the hub 62 of said nest of gears. Afork 63 is arranged to shift the nest of gears 51, 52, being shownreceived in an annular groove 64 in said nest of gears.

The fork 60 is fixed to a rod 67 slidable axially in a bearing 68 of thecasing, and the fork 63 is fixed to a rod 69 slidable axially in abearing 70 of the casing.

The clutch 86 is exemplified as a friction clutch comprising frictionplates 71,' 72.

The hub is provided with lugs 78 received' inrsl'ots 74 in the outerperipheries of the friction plates 71 for driving said friction plates.The'fr'iction plates 72 have slots 75 at their inner peripheries, inwhich lreys 76 in a hub T8 are received. A collar 79 has slots 80 inwhich the keys 76 are also received. The friction plates and the collarhave relative axial movements on the huh for release relation oractuated relation in the clutch.

A. collar 81 is threaded on a threaded portion 82 of the hub 7 8,exemplified as a split collar, having a split 88 therein. Camlevers 84,85, are pivoted to the collar, respectively on a holt 86 and -a pin 87.The

bolt is arranged to clamp the split collar about the hub 78 by drawingtogether its split ends after adjustment of the collar 81 on the hub,ad]- Listing the distance between said collar and an annular flange 88on said hub, and thereby adjusting the pressure on the friction platesand the collar 79 located between said annular flange and the camendsofthe levers pivoted on the collar 81. The cam-levers are normallyretracted by springs 89 fixed in the collar 81.

A frusto-conical collar 91 is axially slidable on the shaft 21, and hasa frustoconical face 92-for coa-ction with the outer ends of the camlever 84, 85, and an annular resting face. 93 with Which the inner faces94 on the outer ends of the cam-levers coact.

Said inner rfaces are parallel With each other obtained Withoutaffecting such actuated relation.y y

The inner end of the frusto-conical collar is arranged to strilre thecollar 81 when in fully actuated relation, regardless of the ad-`justments of the latter, the frusto-conical collar being provided Withan end recess 95 in lWhichthe threaded end of the hub '78 is receivedwhen the adjustment of the threaded collar is such as to cause the hubto extend beyond the threaded collar.

A fork 97 is received in an annular groove 98 in the frusto-conicalcollar for actuating the latter. The fork 97 is fixed to a rod 99slidable axially in a bearing 100, 101, of the casing.

Means are provided to shift the rods 67, 69 and 99 axially in suchmanner that speed change is effected in advance of clutch actuation.Thus a rockable member is pivoted about the axis of the rod 99, andcomprises a rockable part 106 and a lever 107. Thev rod 99 isexemplified as slidable in the roclable member by means of a spline-keyand groove connection 108. The roclrable lever 107 is pivoted on a. stud109 of the rockable part, extending at substantially right angles to therod 99, by means of a bearing 110 in a head 111 of said lever, the leverbeing held to said stud by a screw 112vand Washer 113.

The rocha-ble part is provided with locking lugs 116, 117, arranged tobe received in slots 118, 119, with which the rods 67 and 69 arerespectively provided.y The. lever 107 is provided with shitting pins121, 122, received in slots 123, 124, with which the rods 67 and 69 arerespectively provided. The rockable member is shown pivoted between therods 67 and 69 and the slots 118, 119. and 123, 124, are respectively atopviosite sides of said rods, being shown respectively in the lowerfaces and upper faces of said rods.

The lugs and pins are normally'located in said slots for locking theshittable rods in neutral positions, the slots being suiiiciently deepfor permitting each of the lugs and pins to be received in their slotsto sufficient extent to tree the opposite lug and pin by rocking of therockable member for endwise shifting of each rod of said pair of rodswhile the other of said pair of rods is locked in neutral position.. Aspring` 126 is fixed to the rockable member, being shown as aleaf-spring comprising the wings 127, 128, respectively bearing upontherods 67 and 69, for holding said rods in actuated relations, andurging the roclable' member toward neutral relation.

The rockable member is provided with a slot 129 in which the head of abolt 130 is received for endwise positioning of the rockable member, thebolt being threaded into thel casing.V

The head of the lever 107 isprovided with a slot 133 in which a pinshown as a screwhead of a screw 134 is received, a slide 135 beingreceived in said slot about said pin. rlhe screw is threaded into therod `99 .and clamps the spring 126 to said rod, which in turn rocks withsaid rockable member'. The slot 133 is a cam-slot, extending` crosswiseof the rods, the pin being normally in the middle of the slot so thatendwise movement ci? the rod for clutch operation takes place uponmovement of the lever in either direction. n

Explaining the operation, it will be assumed that it is desired toeffect speed change to speed No. 4, and that the parts are in neutralrelations, as shown in Figs. 1, 6 and 8, in which relations the speedchanging gears are out of mesh, as shown in Fig. 1, and the shiftingparts are in locked relation, as shown in Fig. 6. The rockable member isrocked to cause the loclring lug 117 to sink into slot 119 of rod 69 andthe locking lug 116 to move yout ot' slot 118 ot rod 67 to release rod67. At the same time the shifting pin 122 moves out ot slot 124 in rod69 and the shifting pin 121 sinks into slot 123 in rod 67. Suchrelations are shown in Fig. 7.

Upon movement of the swinging end of the operating lever toward theleft, the rod 67 moves toward the right, for moving the nest ot gears54, 55, toward the right and causes the gear to move into meshingrelation with the gear 49, as shown in Fig. 4.

Owing to the relations of the shifting pins 121 and 122 to the pivotedaxis ot the lever 107, these pins being normally distanced from saidaxis in directions at substantial right angles to the directions ofmovement or" the rods 67, `69. the initial movement of said rods is aquick movement, the speed of which decreases as the swinging movement ofthe lever progresses at a constant speed.

rldhe movement of the operating lever will also cause actuation in theclutch after the meshing relation between the gears 55 and 49 has beeneffected. The pin 134 of rod 99 is distanced from the pivot of the lever107 in a direction in line with the' rod 99, and the slot 133 extends ina direction at substantial` right angles to said last-named direction.During the initial part of the movement of the lever 107 the movementci. the rod 99, which affects the clutch, is therefore slight, themovement of the rod accelerating as the movement of the leverprogresses. f

The actuation in the clutch suii'iciently tor transmission of powertalles place during thelatter portion of the movement of the lever. forpermitting the speed change to be effected prior to power transmission,as exemplified in Fig. 4, although there may be an initial idle rotationot the gears just sufficient to permit ready meshing between the gears.Further movement of the lever causes the meshing gears to be broughtinto line with each other and movement of the riding face 93 along thecoacting faces 94 in the clutch. i

The parts are held in actuated relation by pressure oi the spring 126upon the shifted rod, the rockable member remaining in rocked relationby contact ot the lug 116 with the periphery of the rod 67, the lug 117remaining in the slot 119 `tor holding the rod 69 in neutral position.

lVhen it is desired to bring the meshing gears out of mesh for a furtherspeed change or 'for cessation ot' operation, the lever is moved in theopposite direction. The first eii'ect is to release the clutch by aninitial accelerated movement of the pin 134, followed by a movement ofthe shifting rod which has connection with the meshing gear to move saidmeshing gear out of meshing relation, to again cause neutral relation inthe gearing and clutch.

Either rod 67, 69, may be moved in either direction for different changeot speed 1n similar manner, the clutch rod being simi-v withoutdeparting 'from the spirit 0f my invention within the scope et theappended claims.` y

My imprcveil device is simple and compact, locks the parts in neutral.yrelation as wel] as in shifted relations` insures cessation oi" drivingforce during` neutral relation in the gearing and while making speedchanges until meshing relation in the gears has been obtained, andinsures cessation ci driving force prior to disengagement oi the gearingwhen disconnecting the gearing.

Having thus fully described my invention, what I claim as nevv, anddesire te secure by Letters Patent, is:

'1. In speed changing mechanism, the combination. of gearing, a pair etshittable elements icr effecting speed change in said gearing, reclablemember rnckable in planes substantially parallel to and substantially atright angles to the shifting movement of said shii'table elements, and apair of shifting parts and a pair of locking parts respectively havingconnection with ,opposite ones of said shi'ttable elements for shifting`movement of one ci said shii'table elements and locking of the other ofsaid shiftable elements.

2. In speed changing mechanism, the combination `of gearing, shiftableelements for effecting speed change in said gearing, a rockable membercomprising a rockable locking part and a roclable element-shifting part,means whereby rocking of said roclrable member effects lockingconnection of said rockable locking part with one of said shiftableelements and release of another of said shiitable elements and shiftingconnection of `said element-shifting part with said other of saidshift-able elements and. release of said one of said shiftable elements,means JFor maintaining said relations during shifted condition of saidelement-shifting part, and spring means between said rockable membersand said respective shi'itable elements for maintaining said shir'tedcondi tion.

3. In speed changing mechanism, the combination of gearing, a pair ofshiftable elements for effecting speed change in said gearing, and arockable ymember having a pivot between said shiftable elements, saidrockable member comprising a pair of loci;- ing parts at one side ofsaid shiftable elements and a pair of' shifting parts at the other sideof said shiftable elements constructed and arranged for selectivelocking and shifting relation with opposite ones of said shiftableelements.

t. In speed changing mechanism, the combination of gearing, a pair ofshiftable elements for eli'ecting speed change in said gearing, and arockable member having a pivot between said shiftable elements, saidrockable member comprising a pair of locking parte' at one side of saidshiftable elements and a pair of shifting parts at the other side ofsaid shiftable elements constructed and arranged ttor selective locking`and shitting relation with opposite ones of said shiiftable elements,and said parts so formed as to maintain said relations during shiftedrela-tien oi one of said shittablc elements.

5. In speed changing mechanism, the combination of gearing, a pair ofendvvise shiftable elements for effecting speed change in said gearing,and a reckable member coinprising a rockable locking part and a rockableshifting part, said rockable locking part and. said rockable shiftingpart rockable on an axis substantially parallel with the directions ofmovement of said endivise shitable elements, said endwise sbiitableelements and said roclrable locking part provided ivith coacting lockingfaces. said end- Wise shiftable elements and said ifoclrable shiftingpart provided with coacting shifting faces, and said coacting lockingfaces and said coacting shifting faces for opposite ones of endvviseshiftable elements brought into coacting relation by rocking of saidrockable member on said first-named axis;

6. In speed changing mechanism, the combination of gearing, a pair ofendwise shiftable elements for effecting speed change in said gearing,and a rockable member comprising a rockable looking part and a rockableshifting part, said rockable locking part and said rockable shiftingpart rockable von an axis substantially parallel with the directions ofmovement of said endwise shiftable elements, said rockable shifting partrockable on an axis substantially at right angles to said directions,said endwise shiftable elements and said rockable locking part providedWith coacting locking faces, said endvvise shiftable elements and saidrockable shifting part provided vvith coacting shitting iiaces. saidcoacting locking Jfaces and said coacting shifting faces for oppositeones of said endvvise shiftable elements brought into coacting relationby rocking of said roclrable member on said first-named axis, and saidendwise shiftable elements shiftable endvvise by rocking of saidshifting part on said secondnamed axis. y

7. In speed changing mechanism, the combination of gearing, a pair ofendwise shiftable elements for eecting speed change in said gearing, anda rockable member comprising a rockable locking part and a rockrightangles to said directions, said endwise shiftable elements and saidrockable locking part provided with coacting locking faces and saidendwise shiftable elements and said rockable shifting part provided withcoacting shifting faces, said coacting locking faces and said coactingshifting faces for opposite ones of endwise shiftable elements broughtinto coacting relation by rocking of said rockable member on saidfirst-named axis, said endwise shiftable elements shiftable endwise byrocking of said shifting part on said second-named axis, and saidendwise shiftable elements and said rockable locking part provided withcoacting faces for maintaining said locked relation during said endwiseshifted relation.

8. In speed changing mechanism, the coinbination of gearing, a pair ofendwise shiftable elements for effecting speed change in said gearing, arockable member pivoted between said endwise shiftable elements on anaxis substantially parallel with the endwise movements of said elements,a lever pivoted on said rockable member on an axis substantially atright angles to said firstnamed axis and coacting locking parts betweenone side of said endwise shiftable elements and said rockable member,coacting shifting part-s between the other side of said. endwiseshiftable elements and said lever, constructed and arranged forsiinultaneous engagement between opposite ones of said locking parts andshifting parts for locking of one of said shiftable elements andshifting of the other of said shiftable elements.

9. In speed changing mechanism, the combination of a gearing, a pair ofendwise shiftable elements for effecting speed change in said gearing, arockable member pivoted between said endwise shiftable elements on anaxis substantially parallel to the endwise movements of said elements, alever pivoted on said roclable member on an axis substantially at rightangles to said firstnamed axis, coacting locking parts between one sideof said endwise shiftable elements and said rockable member, coactingshifting parts between the other side of said endwise shiftable elementsand said lever, constructed and arranged for simultaneous engagementbetween opposite ones of said locking parts and shifting parts forlocking of one of said shiftable elements and shifting of the other ofsaid shiftable elements, and means for stationarily positioning saidrockable member endwise.

10. In speed changing mechanism, the combination of gearing, a pair ofendwise shiftable elements for eifecting speed change in said gearing, arockable member pivoted between said endwise shiftable elements on anaxis substantially parallel to the endwise movements of said elements, alever pivoted on said rockable member on an axis Substantially at rightangles to said first-named axis, coacting locking parts betweenv oneside of saidendwise shiftable elements and said rockable member,coacting shifting parts between the other side of said endwise shiftableelements and said lever, constructed and arranged for simultaneousengagement between opposite ones of said locking parts and shiftingparts for locking of one of said shiftable elements and shifting of theother of said shiftable elements, and spring means for urging normalrelation between said rockable member and saidendwise shiftableelements. l

l1. In speed changing mechanism, the' combination of gearing, a pair ofendwise movable rods provided with slots at their respective sides, saidrods having connec.

tions with said gearing for speed change in said gearing, a rockablelocking member pivoted between said rods on an axis substantiallyparallel with said rods, said rockable locking member provided withlocking lugs coacting with said slots at one side of said rods, and alever pivoted to said rockable member on an axis substantially` at rightangles to said first-named axis, said lever provided with lugs coactingwit-lisad slots at the other side of said rods, all said lugs normallycoacting with all said slots for normal endwise neutral locked relationof said rods, and constructed and arranged whereby rocking of saidrockable locking member causes locked relation of one of said rods andunlocked relation of the other of said rods and freed relation betweensaid lever and said one of said rods and engaged relation between saidlever and said other of said rods for shifting movement of said other ofsaid rods.

l2. In speed changing mechanism, the combination of gearing, a pair ofendwise movable rods provided with slots at their respective sides, saidrods having connections with said gearing for speed change in saidgearing, a rockable locking member pivoted between said rods on an axissubstantially parallel with said rods, said rockable locking memberprovided with locking lugs coacting with said slots at one side of saidrods, and a lever pivoted to said rockable member on an axissubstantially at right angles to said first-named axis, said leverprovided with lugs coacting with said slots at the other side of saidrods, all said lugs normally coacting with all said slots for normalendwise neutral locked relation of said rods, constructed and arrangedwhereby roclring of said rockable locking member causes locked relationof one of said rods and unlocked relation of the other of said rods andfreed relation between said lever and said one of said rods and engagedlio :relation "between said lever "and said other ofsaidfrods forshift-ing movement or said A'other vof said rods, land said 'other ofysaid Yrods lprovided with lan engaging tace for said locking member tomaintain said lockrespective sides, said rods having connnec tionswithsaid gearing for speed chaiigein ts'aid"geariiig,`a rockable lockingmember' piv- "otedbet'ween said rods onlan axis substantiallyparallelwith said rods, said `rockable locking member provided with locking lugscoacting with said slots at one side of said I'et frods,ia lever pivotedto 'said rockable mem- 'bero'n an aXis substantially at right angles ttosaid irstaiamed axis, said lever provided "with lugs coacting with saidslots at the other side of 'said rods, all said lugs nor- `mally!coacting with all said slots tor normal endvvise lneutral lockedrelation oif`said rods, constructed and arranged whereby krocking ofsaid rocliable locking member 'causes looked relation of one of saidrods 'and unlocked relation of the other of said rods 'and :freedrelation between said lever fandsaid one ofsaidrods and engaged rela-`tin between said lever and said other ot 'said rods, for shittingmovement of said other ot'said rods, and spring means to noi'- mallyurge said lugs and slots into coacti'ng relation.

14.1In speed changing mechanism, the combination of gearing, a pair ofeiidwise "movabl'erods provided with slots at their respective sides,said rods having connections with said'gearing tor speed change in saidgearing, a ro'clrabl'e locking memberpiv- 'oted between said rods on anaxis subst-anvtially parallel with said rods, said rockable'loclring'inember provided with locking lugs 'coacting vvith said slotsat one side of said rods, a lever pivoted to said i'oc'kaole memberon anaXis substantially at right angles 'tofsaid irst-iiained aXis, saidlever provided with :lugs 'ceac-ting with said slots 'at the otherA'side of said rods, 'all said rods nor- `inally'coacting with all saidslots tornormal "endwi'se neutral locked relation of 'said'rods,constructed and arranged whereby rocking ofl said rockable lockingmember Causes lockedrelation of one of said rods and iin- `lockedrelation of the other of' said rods and "sliiftable rods foreiiecting-speed change in "'said'gearmg, a rockable member, a shiftinglever, said rods provided with slots on opposite sides, said rockablemember and said lever provided with lugs coaoting with said slots frespectively on said opposite sides,

means yfor pivoting said rockable member i yelement for speed change insaid gearing, a

clutch, an endwise shittable element for clutch actuation, and arockable member located in a plane parallel to the plane in which saidendwise shittable elements are located, .said roelable member havingoperative connection with said first-named endwise shiftable element andoperative connection with said secoiid-named endwise shiftable element,a right line between said second-named operative connection and the.pivot of said rockable memberl being substantially parallel with thedirections of movement of said endwise shiftable elements, and a rightVline between said rstnamed operative connection and said pivot being atsubstantial right angles to said tirstnamed right line.

17. In speed changing mechanism, 'the combination of gearing, a pair ofslii't'table elements for speed change in said gearing, a clutch, aslii'ftable element for clutch actuation, a rockable member, saidshiftable elements extending to one side ot' said rockable member, anoperative connection between said shittable element for clutch actuationand said roclrable member at said side of said rockable member, andoperative connections between said pair of shiftable elements and saidrockable member located at the respective sides of the pivot of saidrockable meinber at substantial right angles to said lirstnamed side.

18. In speed changing mechanism, the

combination of gearing, a pair ot shi'itable I elements for speed changein said gearing, Va clutch, a fshittable element for clutch actuation, arockable member, said vshittable elements extending to one side ot saidrockable member, an operative connection betweeny said sliiftableelement ior clutch actuation and said rockable member at said side ofsaid rockable member, and operative connections between said pair ofshiftable elements and said roclable member located at the respectivesides of the pivot of said rochable member at substantial right anglesto said firstaiamed side, said first-named operative connectionincluding a guide eccentric to. v

lsaid pivot.

iso

1,514,485 teg 19. ln speed changing mechanism, the combination ofgearing, a pair of shiftable elements for speed change in said gearing,a clutch, a shiftable element for clutch actuation, a rockable member,operative connections between said rockable member and the shiftableelements of said pair of shiftable elements, and operative connectionbetween said rockable member and .said shiftable element for clutchactuation, said first-named operative connections arranged for initialincreased and gradually retarding movement, and said last-namedoperative connection arranged for initial retarded and graduallyincreasing movement.

20. ln speed changing mechanism, the combination of gearing, a pair ofendwise shiftable elements for speed change in said gearing, a clutch,an endwise shiftable element for clutch actuation, said last-namedendwise shiftable element located between said first-named shiftableelements, a rock able member having a pivot substantially intersectingsaid endwise shiftable element for clutch-actuation, operativeconnections between said rocha-ble member and said pair of endwiseshiftable elements located in directions from said pivot at substantialright angles to said second-named endwise shiftable element, and anoperative connection between said rockable member and said second-namedendwise shiftable element located in a direction from said pivotsubstantially in line with said second-named idwise shiftable element.

2l. ln speed changing mechanism, the combination of gearing, an endwiseshiftable rod for speed change in said gearing, a clutch, an endwiseshift-able rod for clutch actuation, a rockable member pivoted about theaxis of said last-named rod, locking means between said rockable memberand said first-named endwise shiftable rod, a rockable part on saidrochable member, and shifting means between said rockable part and saidendwise shiftable rods.

22. In speed changing mechanism, the combination of gearing, an endwiseshiftable rod for speed change in said gearing, a clutch, an endwiseshiftable rod for clutch actuation, a rocha-ble member pivoted about theaxis of said last-named rod, said .last-named rod movable axially, arockable part on said rockable member, and shifting means between saidroclrable part and said endwise shiftable rods.

23. ln speed changing mechanism, the combination of gearing, a pair ofshifta-ble elements for speed change in said gearing, a clutch, ashiftable element for actuation in said clutch, and a rockable memberrockable. in two planes substantially at right angles to each other,said rockable element normally in shifting relation with said pair ofshiftable elements and with said second named shiftable element bymovement in substantially one of said planes, and arranged for releaseof one of said elements of said pair of elements by movement insubstantially the other of said planes.

24. ln speed changing mechanism, the. combination of gearing, a pair ofshiftable elements for speed change in said gearing, a clutch, ashiftable element for actuation in said clutch, a rockable 'memberrochable in two planes substantially at right angles to each other, saidrochable element normally in shifting relation with said pair ofshiftable elements and with said second-named shiftable element bymovement in substantiallyone of said planes, locking means for normally7locking said pair of shiftable elements, and means whereby to releaseone of said elements of said pair of elements from said roclrable memberand to release the other of said elements of said pair of elements fromsaid vlocking means, by movement of said rocha-ble element insubstantially the other of said planes.

25. In speed changing mechanism` the combination of gearing, a pair ofshiftable elements for effecting speed change in said gearing, a clutch,a shiftable element for actuation in said clutch, a rockable membercomprising a roclrable locking part and a rockable element-shiftingpart, and means whereby rocking of said rochable member effects lool-zing connection of said kroclable locking part with one of said elementsof said pair of shift-able elements and release of the other of saidshiftable elements of said pair and shifting connection of saidelement-shifting part with said other of said shift-able elements andrelease of said one of said shiftable elements, and saidelement-shifting part having operative connection with said shiftableelement for actuation in said clutch.

26. ln speed changing mechanism, the combination of gearing, a pair ofendwise shiftable elements for effecting speed change in said gearing, aclutch, an endwise shiftable element for edecting actuation in saidclutch, ak rockable member comprising a roclrable locking part and arockable shifting part, said rockable member rocha-ble about the axis ofsaid last-named endwise shiftable element, said endwise shiftableelerespective shi table elements of said pair for effecting speedchangel in advance of said movementL of' said second-named shiittableelement for effecting; rclutch actuation.

Q7. ln speed changing mechanism, the combination ot gearing, pair ofrods havingconnections or speed change in said gearing, a rochablemember *having a. pivot between said rods substantially parallel withsaid rods? a clutchj a third rod having connection with clutch 'foractuating;` the Same, and a leiser pivot-ed on said rochable member onan anis substantially at right angles to Said ii'st-i'ia.rnecl pivot7sain rochable member provided with locking` Yparts for Said pair ofrods, and said lever provided with shifting parts for said pair of rodsand with shitting part for said third rod.

28, ln speed changing mechanism, the combination of gearing7 a pair oitrods having connections ttor speed change in said gearing, a rockablemember having a pivot betvveei'i said rods substantially parallel withsaid rods, a clutch, a third rod having connection with said clutch 'foractuating1 the same, and a lever pivoted on said rockable member on anaxis substantiaily at right angies to said rst-named pivot, saidrochable member provided with lockingparts for said pair ot rods, saidlever provided with shittingv parte for said pair oi rods and With ashitting connection with said third rod, and said shittingconnectioncomprising a cam-:tace extending in a line substantially parallel ingeneral direction With a right line between said shitting parts.

Q9. ln speed changing` mechanism, the combination of gearing7 a pair ofrods hav ing` connections for speed change in Vsaid gearing, a clutch, athird rod having, connection With said clutch for actuating the samesaid third rod located between' said first-named rods, a rockable memberpivoted about said third rod,y a lever pivoted on said rockable memberon an axis substantially at right angles to said third rod, said yrockable `member provided with locking parts for said pair of rod's,said rlever provided vvith shitting parts for Said pairy of rods andwith a shifting connection with `the rocking poeitions of said rockablemember.

30. ln speed changing mechanism,v the combination of gearing, a pair ofrods havl ing connections tor speed change in said gearing, a rockablemember having a pivot between said rods substantially parallel with saidrods, a clutch, a third rod having connection With said clutch foractuating the. same, al lever pivoted on said roclrable member on anaxis substantially at' right angles to said tiret-namedr 13ivot,`saidrocliable member provided with locking parts for said pair of rods7 saidlever provided with shifting parts for said pairot rods and with ashitting` yconnection with said third rod, and a spring` mounted iormovement with said lockable member and arranged for eX- erting pressureon said pair of rods.

ln testimony whereof, l have hereunto signed my name in the presence oftwo sub scribing witnesses.

PAUL i S. WARD.

ln presence 0f- PAUL V. CoNNoLLY, DELMA WERNSING.

